4 ms·
Given that the antennae are at surface level and the aircraft are probably between 25,000ft and 40,000ft, I wonder what the ideal maximum range of the receivers
by nacnud 10y ago
Given that the antennae are at surface level and the aircraft are probably between 25,000ft and 40,000ft, I wonder what the ideal maximum range of the receivers would be?
- emilburzo 10y agoWith a basic RTLSDR and a random small TV antenna (nothing optimized for this use case), from my apartment I've picked up airplanes that were at 40000ft and at a distance of ~ 100 km (62 miles). Optimizing the antenna and the hardware (and using a lot less cable for the antenna than I have) would probably increase that significantly.
- pricechild 10y agoWith VHF a handy formula is miles = 1.25sqrt(feet) So 25000ft gives a range of ~190 miles, 40000ft gives ~240 miles.
- nacnud 10y agoThanks! The target area is approximately 250 miles equidistant from Iceland & Norway, so it's feasible that one of these boats could cover the entire area (under ideal conditions).
- mduell 10y agoADS-B is not on a VHF frequency.
- pricechild 10y agoIt is indeed UHF. I should've put "VHF/UHF" in the original comment as the formula is reasonable for both. They're both Line of Sight and that's really what the approximation is about.
- deleted 10y ago[deleted]